2. Complete the following syllogisms by providing the missing statements a: All mammals are vertebrates. b: A cat is a mammal. C: If two lines are perpendicular, then they form right angles. Therefore, lines / and m form right angles. CHECKPOINT 4 Determine whether each of the following problems is solved by inductive or deductive reasoning. Explain why. 1. 2. When the class was asked to find the nth term of the sequence 3, 5, 7, 9, .. Antonio gave the expression 2n + 1. Two angles of a triangle measure 40 and 60. Amelia found the third angle using "angle sum of a triangle."